Core Drill by KOR-IT®, the leading manufacturer of diamond tools and core drill machines. KOR-IT is an OEM based in Sacramento CA, manufacturing core drills, core drill bits, diamond saw blades, search and rescue equipment and related accessories. KOR-IT® maintains its’ valued and trusted brand name since 1958, by providing quality design, engineering and manufacturing to the concrete drilling industry. To support our reliability, KOR-IT® is the only manufacture in our industry offering a lifetime warranty for our core drill machines.